Carbureter throttle-valve.



W. JAMES. GARBURETER THROTTLE VALVE. APPLICATION FILED APR. 22, 1913.

wizesses:

Patented May 26, 1914.

srarns PATENT OFFICE.

'WILLIAM JAMES, OF BROOKLYN, NEW YORK.

CARBURETER THROTTLE-VALVE.

.Specification of Letters JPatent.

Patented May 26, 1914.

Application md 'aprnaa 1913. seriaino. 762,858.' l

the iniux and-amount of gas mixture thatl Amay be supplied to explosivegas engines.

A great variety of such valves have been used, such as butterfly valvesand the like, and I have found in practice thatthe form now to bedescribed has many advantageous features over the types now in use.

Further, valves of the typefx disclosed in the accompanying drawingsherewith have also been used but have been made entirely in the form ofa casting and my improvement primarily consists in modifying thestructure in such a manner as to make it more practical and economicalin manufacture. v

In the accompanying drawings, Figure 1 shows a conventional type ofcarbureter having a portion of the gas outlet end broken away. Fig. 2 isone form of my device removed from the carbureter. Fig. 3 is a plan viewof one of the shutter members. Flg. 4 is a plan view of a co-actingshutter member. Fig. 5 is a plan view of the valve housing with thevalve or shutter members removed. Fig. 6 is a sectional view of the same-takeon on the line 5 5., Fig.- 5. Fig. 7 is a plan view of another formof shutter member. Fig. 8 is a sectional v iew of a modified shutterconstruction. And, Fig. 9 is a sectional view of a like type of shutterof the present type of construction. y p

In carbureters of the type shown in Fig. 1, under suction impulse of thegas engine piston, air is drawn 1n at the inlet openino' 1 in thedirection of the arrow 1, and, a er passing down through the interior ofthe carbureter, comes forth from the outlet valve 2 in the direction oft-he arrow 2 mixed or saturated withv the proper amount of explosive gasor'ga'solene vapor. This explo` sive mixture is led thence to thecylinder of the engine for explosion. For the purpose of controlling thesupply of gas to the said cylinder and for throttling the speed of theengine or shutting it down entirely, I have provided pinched between thesaidfoutlet pipe 2 and the body of the carbureter 3, and connectmg andcontrolling the o-w of explosive mixture through the same, a shuttervalve whlch is comprisedof a cast metal casing 4 and apair of stampedsheet metal shutters 5 and 6. This valve is designed to be used withcarbureters now in common use, `to be located adJacent thereto in theline ap-` plying the engine with explo-sive mixture, to replace thecostly and bulky valves now used and 'toeconomize space where so to dois highly desirable, and to that end its-iattaching means are made tomatch those most common in such apparatus. To these. ends the valvecasing 4 is provided with lugs 7 and -8 and therein bolt holes 9 and ,l0which match corresponding bolt. holeson the lcarbureter and, generally,on the suction valve which (Fig. 1) is illustrated asset upon the valvecasing 4,and, 'by its finished flange,

conining the shutters 5' and 6. Usually studs extend from the carbureterthrough bolt holes in lugs on the suction valve and in such cases thebolt holes9 and 10 of the casing 4 will merely center it in the pipeline and it will be pinched between the carbureter and the suctionvalve.

In order to provide suiiicient aggregate.

the casing 4 is made a squatty :bowl or truncated cone, with an orificein its small end 15, to matchthat in the carbureter, a

rabbet 16, in its face 22 for the shutters, and to msure good ts andsmooth flow. of explosive mixture its interior and faces are machined.A` slot 1 8 in the rabbet'16 provides for angularly xing the xedshutter,.6, and

for thep'lay of the arm 24 of the movable shutter 5. To one side of saidrecess 18 I rovide a radially extending lug 11, tapped or a. limit'sorew12, provided with a set nut 13, and adapted to limitthe. motion/of orYposition the movable shutter 5, to regulate 'the area of opening throughthe shut-ters.

Both shutters 5 and 6 have sector-like matching openings 23 and centralbores 20 and 21,

for a pivot, 19, which connects them. The

movable shutter 5 has a radial arm 24 ter` minating in a pm holeforconnection with the engine or governor, whereby 'to operate the valve;and a depending lug to coact with A the limit' screw 12, for adjustingthe flow.

The fixed shutter 6 has a projecting seg-ff' ment, 1?,- to fix it 1n thecasing with which it i is preferably a forcing t. To set the'ralv'e,

-- arm 24 ofthe movable shutter 5 is then suitably connected and thelimit screw 12 adjusted.

It has heretofore been the custom in this type of valve to make thecasting po-rtion 4e include, as an integral port-ion of the casting, theshutter portionshown as a separate .member 6, and it is obvious thatIwhen the inner surfaces 14, 15 and 16 had to be machined and theapertures 23 in the shutter 6 had to be opened up, diliicultieswereencountered owing to the impracticable construction thereof. Byproviding the shutter member 6 as a separate element the same can beblanked out by punch press operation to an exact size, and thereafterforced into the machined casting as previously described.

There is shown in Fig. 9 a sectional view of a cast casing, as abovedescribed, the indices indicating the same component parts as shown inFig. 1. Owing to the extra coring necessary in casting this piece, andthe necessity of machining the interior thereafter, as well as facingand smoothing up the apertured valve portion thereof, 4it will be seenthat this piece made as above described` is expensive. By my improvedconstruct-ion, however, the Vcast-ing needs no core to cast itsowninte-rior, being self coring, but is more convenient-ly reached from thevalve side for machining, whe-reas in the integral cast construction theinterior must be machined from'the rear, whichis difiicultand expensive.

Another form embodying, my improved valve construct-ion is shown inFigs. 7 and 8 wherein the fixed shutter member 6 is substantially of thesaine outline as the casing member 4, and the movable shutter 5 is ofdiscoid form having an operating arm 24 thereon similar to arm 24 onmember 5, Fig. 3. In this construction the movable shutter 5 is placedin the seat and the stamped sheet metal shutter member 6 is placed overthe same and the assembled unit placed` between the carbureter 3 and theoutlet pipe 2, to be thereafter locked in positipn by means of thepreviously mentioned s. This is a modification of the sheet metalshutter construction previously disclosed and is analogous to thesame,and permits of the same economy in manufacture.

Having thus described my invention, I claim:

1. A regulating shutter-valve adapted to be interposed and registered inthe pipe line between a carbureter and an engine and comprising ahollow, truncated cone provided with an opening in it-s Small endadapted to register with the carbureter outlet and a slotted rabbet inits large end adapted to lix one and rockably mount the other shutter ofa shutter valve; aperforated stamped-metal shutter fixed in said rabbet,and rockably mounted therein a perforated, stamped metal shutter; andmeans to fix said valve, in register, in said pipe line.

2. A regulating shutter valve adapted to be interposed and registered inthe pipe line between a carbureter and an engine and comprising ahollow, truncated cone provided with an opening in its small end adaptedto register with the carbureter outlet and a slotted rabbet in its largeend adapted to fix one and rockably mount the other shutter of a shuttervalve; a perforated stamped-metal shutter fixed in said rabbet. androckably mounted therein a perforated, stamped metal shutter; a radialoperating arm thereon; and means to fix said valve, in register, in saidpipe line.

, 3. A regulating shutter valve adapted to be interposed and registeredin the pipe line between a carbureter and an engine and comprising ahollow, truncated cone provided with an opening in its small end adaptedto register with the carbureter outlet; a slotted rabbet. in its largeend adapted to fix one and rockably mount the other shutter of a shuttervalve; a radial lug adjacent to said rabbetl and a limit-screw therein;a perforated stamped-metal shut-- ter fixed in said rabbet., androckably mounted therein a perforated, stamped metal shutter;.a radialoperating arm thereon'and means on said arm to engage said limitscrew;and means to fix said valve, in register, in said pipe line.

4. A regulating shutter valve adapted to be interposed and registered inthe pipe line between a carbureter and an engine and comprising ahollow, truncated -cast cone with its faces and interior machine-d andprovided with an opening in its small end adapted to registenwith thecarbureter outlet and a slotted rabbet in its large end adapted to fixone and rockably'mount the other shutter of a shutter valve; aperforated stamped-metal shutter fixed in said rabbet. and rockablymounted therein a perforated, stamped metal shutter; and meansl to fixsaid valve, in register, in said pipe line.

WILLIAM JAMES.

Witnesses:

HAROLD D. PENNEY, JOHN MORRIS.

